National Guard at border with Mexico

February 17, 2017 9:35 AM

Photo: John Moore/Getty Images

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An Arizona National Guardsman watches over the U.S. border with Mexico at an observation post on December 7, 2010 in Nogales, Arizona. The Obama administration ordered more than 500 soldiers placed along the Arizona border to man "entry identification sites" and spot illegal immigrants crossing into the United States.

An Arizona National Guardsman watches over the U.S. border with Mexico at an observation post on December 7, 2010 in Nogales, Arizona. The Obama administration ordered more than 500 soldiers placed along the

National Guardsmen stand in formation along the U.S.-Mexico border during a visit by California Gov. Arnold Schwarzenegger August 18, 2010 in San Ysidro, California. U.S. President Barack Obama has ordered more than a thousand National Guard troops to the border in response to border patrol agents who are overwhelmed by drug smugglers and illegal immigrants. (Photo by Sandy Huffaker/Getty Images)

National Guardsmen stand in formation along the U.S.-Mexico border during a visit by California Gov. Arnold Schwarzenegger August 18, 2010 in San Ysidro, California. U.S. President Barack Obama has ordered

National Guardsmen stand in formation along the U.S.-Mexico border... Photo-12398007.141434 - Laredo Morning Times

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Border Patrol agents apprehend immigrants, mostly from Central American, along the Texas /Mexico border near McAllen. While the historical wave of migrants, mostly women and children, that crossed earlier this year has abated immigration is expected to become front and center again as President Obama prepares to issue executive orders involving the issue. The Rio Grande River separates Nuevo Laredo, Mexico, right, and Laredo, United States, left. The Texas National Guard patrols the border area as well as the Border Patrol. (Photo by Michael Robinson Chavez/Los Angeles Times via Getty Images)

Border Patrol agents apprehend immigrants, mostly from Central American, along the Texas /Mexico border near McAllen. While the historical wave of migrants, mostly women and children, that crossed earlier this